How to Get Slow-Motion video Smooth?

Discussion in 'Amateur Video Production' started by blackace, Feb 11, 2004.

  1. blackace

    blackace Guest

    I'm using Adobe Premiere to edit video from a DV camcorder and I am
    wanting to slow down a video clip from 100% to 15% and still have it
    play back "smooth" enough to where you can't distinguish the change in
    frames. I don't want people to see each frame as it changes. Does
    anyone know how to do this?
     
    blackace, Feb 11, 2004
    #1
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  2. This may not be possible, though even reductions like
    50%, 33%, 25% can work if you copy tracks to V1
    or above and offset them from the originals by a frame
    or so with transparency set at 50%. To go very slow,
    you may need to experiment with multiple stages.
    BTW, you can capture the original DV with the camera
    in slow-mo mode to start the process. Experiment...
     
    David Ruether, Feb 11, 2004
    #2
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  3. blackace

    FlyByKnight Guest

    For Premiere solutions, see David's post. However, if you have access to
    After Effects, you can use frame blending to create better slow motion. You
    can get to 25% without it looking "jerky". Anything below that and you start
    to lose smoothness.
     
    FlyByKnight, Feb 11, 2004
    #3
  4. blackace

    FlyByKnight Guest

    I would say that depends on the camera... unless there is some hidden button
    I have not seen in all these years...
     
    FlyByKnight, Feb 11, 2004
    #4
  5. blackace

    Nick Guest

    There are also plug-ins that interpolate frames and smooth it out more,
    Might not be ideal for what you are doing but but one is Twixtor
    http://www.revisionfx.com/
     
    Nick, Feb 11, 2004
    #5
  6. blackace

    Samuel Paik Guest

    Reshoot using a high speed camera.
     
    Samuel Paik, Feb 11, 2004
    #6
  7. Sorry but you can't get clean slomo in premiere. Preiere Pro claims it
    can and I just bought it but I am not holding my breath. I have for
    seemingly ever, tried all the deinterlacing, frame blends,
    De-flickering,V1 / V2 stagger frame method and nothing has ever
    worked.
     
    Product developer, Feb 11, 2004
    #7
  8. Try doing it in divisible increments. 30 frames per second x 2 fields = 260
    fields. If you try slowmo, do it at 15 frames per second(30 fields which is
    divisible by 2 from 60). Otherwise, try after effects.
     
    The Supreme Enchanter, Feb 12, 2004
    #8
  9. blackace

    nappy Guest

    yeah.. which slo-mo mode is that?
     
    nappy, Feb 12, 2004
    #9
  10. blackace

    nappy Guest


    Turn on FRAME BLENDING.
     
    nappy, Feb 12, 2004
    #10
  11. Look on the remote - it is there on all Sony DV camcorders,
    at least, and I would be surprised if both it and stop-motion were
    not provided on other brands also. You can capture the footage
    on the computer while the camera plays it back in slow-motion...
     
    David Ruether, Feb 12, 2004
    #11
  12. Never did much for me in Premiere. Try it both ways
    (with and without) and see if you can really see the
    difference...;-)
     
    David Ruether, Feb 12, 2004
    #12
  13. blackace

    Steve Punter Guest

    The bottom line is that for REALLY SMOOTH slow motion video you simply need MORE FRAMES.
    Unfortunately most camcorders can only capture at a fixed rate, and the best you can hope
    to acheive is to play the frames you do have at a slow rate and apply a bit of blurring to
    help the thing look more realistic. There is no way to make it less jerky because you
    don't have the intermediate images (as they were NEVER RECORDED).

    Proper slow motion is done using a high-speed camera (capturing, for example, hundreds of
    frames per seconds). When these frames are played back at the standard speed (Eg 30 FPS)
    they look smooth because you have 30 full frames to play, and not just 6 frames repeated 5
    times each.
     
    Steve Punter, Feb 13, 2004
    #13
  14. blackace

    codecpage Guest

    ....
    Not entirely true, because intermediate frames could also be computed.
    Have a look at http://www.dynapel.com/index.shtml.
    It may not work perfectly for all footage, but at least worth giving
    it a try.

    Cheers



    http://www.codecpage.com
     
    codecpage, Feb 14, 2004
    #14
  15. blackace

    Steve Pankow Guest

    You might look into Boris Red 3GL and its Optical Flow filter, which
    does some really nice cleanup work.

    Steve
     
    Steve Pankow, Feb 14, 2004
    #15
  16. blackace

    Anon O'Moose Guest

    All video cameras recored at exactly the same frame rate. Otherwise the
    playback decks and TV/Monitors couldn't handle them. All decks and
    cameras for NTSC play at 30 fps (aka 60i or 60 fields). Even the 24p
    Panasonic camera actually records to tape at 60i The frame rate is not
    variable.

    In PAL this is set to 25fps.

    SMM
     
    Anon O'Moose, Feb 14, 2004
    #16
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